为提高高速出口前置指路标志(AGS) 对分流区的安全性能,根据分流区特性和驾驶员的视认-驶离行为,在分析车道变换行驶距离计算模式的基础上,建立了前置指路标志的安全距离设置模型. 该模型揭示了交通流量、设计时速、车道数对分流区变道行为的影响. TSIS-CORSIM 模拟显示,对主线设计时速超过110 km/ h 的三车道高速公路而言,当AGS 设置距离为700m 时,分流区内车辆的变道次数最少且变道次数均衡分散,其安全性能最好.

In order to improve the safety performance of advance guide signs (AGSs) at highway exits for the di-verging area, the characteristics of the diverging area and the visual recognizing-exiting behaviors of the driver are taken into consideration, and a setting model of safe distance of AGSs, which reveals the effects of traffic flow, de-sign speed and lane number on lane-changing behaviors, is constructed based on the analysis of the computation mode of lane-changing driving distance. Then, a simulation is carried out with TSIS-CORSIM. The results indicate that, for a three-lane expressway with a design speed higher than 110km/ h, an AGS setting distance of 700m may result in minimum lane-changing number of vehicles proportionally dispersed in the diverging area, which means that the safe distance is reasonably set.